1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * MIPS support for CONFIG_OF device tree support 4 * 5 * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com> 6 */ 7 8 #include <linux/init.h> 9 #include <linux/export.h> 10 #include <linux/errno.h> 11 #include <linux/types.h> 12 #include <linux/memblock.h> 13 #include <linux/debugfs.h> 14 #include <linux/of.h> 15 #include <linux/of_fdt.h> 16 #include <linux/of_platform.h> 17 18 #include <asm/bootinfo.h> 19 #include <asm/page.h> 20 #include <asm/prom.h> 21 22 static char mips_machine_name[64] = "Unknown"; 23 24 __init void mips_set_machine_name(const char *name) 25 { 26 if (name == NULL) 27 return; 28 29 strlcpy(mips_machine_name, name, sizeof(mips_machine_name)); 30 pr_info("MIPS: machine is %s\n", mips_get_machine_name()); 31 } 32 33 char *mips_get_machine_name(void) 34 { 35 return mips_machine_name; 36 } 37 38 #ifdef CONFIG_USE_OF 39 40 void __init __dt_setup_arch(void *bph) 41 { 42 if (!early_init_dt_scan(bph)) 43 return; 44 45 mips_set_machine_name(of_flat_dt_get_machine_name()); 46 } 47 48 int __init __dt_register_buses(const char *bus0, const char *bus1) 49 { 50 static struct of_device_id of_ids[3]; 51 52 if (!of_have_populated_dt()) 53 panic("device tree not present"); 54 55 strlcpy(of_ids[0].compatible, bus0, sizeof(of_ids[0].compatible)); 56 if (bus1) { 57 strlcpy(of_ids[1].compatible, bus1, 58 sizeof(of_ids[1].compatible)); 59 } 60 61 if (of_platform_populate(NULL, of_ids, NULL, NULL)) 62 panic("failed to populate DT"); 63 64 return 0; 65 } 66 67 void __weak __init device_tree_init(void) 68 { 69 unflatten_and_copy_device_tree(); 70 } 71 72 #endif 73